Can my friend extend his stay in Thailand upon arrival if his outbound flight is more than 30 days away?

The user inquires about extending a stay in Thailand for a friend arriving for 45 days who has a return flight over 30 days from arrival. It is suggested that the friend can extend their stay at an immigration office in their province or, alternatively, obtain a tourist visa prior to arrival for a longer initial stay of 60 days. Additionally, it's noted that an outbound flight within 30 days might be required for boarding, depending on the airline's policy.